<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
  /*  h1{color: #191c1c}*/
    h1{color: rgba(255,0,0,0.5)}
  div{
      width: 200px;
      height: 200px;
      background-color: green;
      background-image:url("./123.jpg");
      background-size: 100px 100px;
      background-repeat: no-repeat;
      background-position: 50% 50%;
  }
  </style>
</head>
<body>
<h1>颜色测试</h1>
<div>
    <img src="../123.jpg" alt="">
</div>
</body>
</html>